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Current Electricity

Current Electricity
The maximum current rating for a 10 kΩ, 0.5 W resistor is

0.707 mA
14.14 mA
28.28 mA
7.07 mA

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Current Electricity
An instrument which detects electric current is known as

Galvanometer
Voltmeter
Wattmeter
Rheostat

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Current Electricity
What voltage drop will be there across a 1 kW electric heater whose resistance when hot is 40 Ω?

200 V
150 V
100 V
50 V

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Current Electricity
In case of liquids, ohm's law is

None of the listed here
Fully obeyed
Partially obeyed
There is no relation between current and p. d

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Current Electricity
The current in the circuit having constant resistance is tripled. The power increases

3 times
9 times
1/9 times
1/3 times

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Current Electricity
Current velocity through a copper conductor is

the same as propagation velocity of electric energy
nearly 3 x 108 m/s
of the order of a few ^.s/m
independent of current strength

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